A number of users have reported problems using the Touch ID fingerprint scanner in the iPhone 5s, and Macworld’s Serenity Caldwell offers some tips on reducing frustration. In particular, she advises scanning your fingerprint at the same angle that you’d most likely use to unlock the iPhone, and if that’s not enough, adding multiple scans at different angles. She also explains some situations where Touch ID might not work well, if at all. follow link
Type Faster on an iPhone or iPod touch
When typing on an iPhone or iPod touch, to end a sentence quickly and get ready to start the next one, double tap the Space bar. You'll insert a period followed by a space. You can turn this shortcut on or off via the Shortcut slider in Settings > General > Keyboard.
- ExtraBITS for 16 December 2013 (16 Dec 13)
Troubleshooting Touch ID